Ingo Weinhold 59a653b51c Support multiple MIME DB directories
Each installation location (system, common, common/non-packaged,
~/config, ~/config/non-package) can now have a read-only data/mime_db
directory. ~/config/settings/beos_mime is now named mime_db as well. The
contents of all directories makes up the MIME DB. Entries in more
specific locations shadow entries in more general locations. Only the
directory in ~/config/settings is where the registrar writes changes to.

The new layout allows packages to contribute entries to the MIME DB by
simply providing the respective files in data/mime_db. Consequently the
user settings directory is supposed to contain only the things the user
has actually changed.

Seems to work fine as far as tested. A few issues, though:
* The registrar doesn't monitor the directories yet, so it doesn't
  notice entry changes due to package de-/activation.
* ATM it is not possible to remove a MIME type that is not in the user
  settings directory, although the FileTypes GUI suggests that it is.
  We'd have to work with white-outs, since we cannot remove the files in
  the data/mime_db directories. Or, alternatively, the API has to be
  extended and the FileTypes GUI adjusted to disable the "Remove" button
  in such a case.
2013-05-07 04:43:51 +02:00
..
2013-05-07 04:43:51 +02:00